"""
Split Flow Details Panel - Top/Bottom layout for flow and sub-flow details
"""

from textual.widget import Widget
from textual.containers import Vertical
from textual.widgets import Static
from textual.reactive import reactive
from rich.text import Text
from rich.panel import Panel
from rich.console import RenderableType, Group
from rich.table import Table
from typing import TYPE_CHECKING, Optional

if TYPE_CHECKING:
    from ....models import FlowStats, FrameTypeStats


class FlowMainDetailsPanel(Vertical):
    """Top panel showing main flow details"""
    
    DEFAULT_CSS = """
    FlowMainDetailsPanel {
        height: 1fr;
        padding: 1;
    }
    
    FlowMainDetailsPanel Static {
        margin-bottom: 0;
    }
    """
    
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.current_flow = None
    
    def compose(self):
        """Create the main flow details layout"""
        yield Static("Main Flow Details", classes="panel-header")
        yield Static(
            "Select a flow to view details",
            id="main-details-content"
        )
    
    def update_flow(self, flow: Optional['FlowStats']) -> None:
        """Update panel with main flow details"""
        self.current_flow = flow
        content_widget = self.query_one("#main-details-content", Static)
        
        if not flow:
            content_widget.update("Select a flow to view details")
            return
        
        details = self._create_main_flow_details(flow)
        content_widget.update(details)
    
    def _create_main_flow_details(self, flow: 'FlowStats') -> RenderableType:
        """Create main flow details display"""
        sections = []
        
        # Flow identification
        id_table = Table(show_header=False, box=None, padding=0)
        id_table.add_column(style="dim", width=12)
        id_table.add_column()
        
        id_table.add_row("Source:", f"{flow.src_ip}:{flow.src_port}")
        id_table.add_row("Destination:", f"{flow.dst_ip}:{flow.dst_port}")
        id_table.add_row("Protocol:", flow.transport_protocol)
        id_table.add_row("Packets:", f"{flow.frame_count:,}")
        id_table.add_row("Volume:", self._format_bytes(flow.total_bytes))
        
        sections.append(Text("Flow Information", style="bold blue"))
        sections.append(id_table)
        
        # Enhanced analysis
        if flow.enhanced_analysis.decoder_type != "Standard":
            enhanced_table = Table(show_header=False, box=None, padding=0)
            enhanced_table.add_column(style="dim", width=12)
            enhanced_table.add_column()
            
            enhanced_table.add_row("Decoder:", flow.enhanced_analysis.decoder_type)
            enhanced_table.add_row("Quality:", f"{flow.enhanced_analysis.avg_frame_quality:.1f}%")
            enhanced_table.add_row("Fields:", str(flow.enhanced_analysis.field_count))
            
            if flow.enhanced_analysis.frame_types:
                types_str = ", ".join(list(flow.enhanced_analysis.frame_types)[:3])
                if len(flow.enhanced_analysis.frame_types) > 3:
                    types_str += f" +{len(flow.enhanced_analysis.frame_types) - 3}"
                enhanced_table.add_row("Types:", types_str)
            
            sections.append(Text("Enhanced Analysis", style="bold green"))
            sections.append(enhanced_table)
        
        # Timing analysis with new columns
        timing_table = Table(show_header=False, box=None, padding=0)
        timing_table.add_column(style="dim", width=12)
        timing_table.add_column()
        
        timing_table.add_row("Duration:", f"{flow.duration:.2f}s")
        timing_table.add_row("Avg ΔT:", f"{flow.avg_inter_arrival * 1000:.1f}ms")
        timing_table.add_row("Std σ:", f"{flow.std_inter_arrival * 1000:.1f}ms")
        timing_table.add_row("Outliers:", f"{len(flow.outlier_frames)}")
        timing_table.add_row("Jitter:", f"{flow.jitter * 1000:.2f}ms")
        timing_table.add_row("First Seen:", self._format_timestamp(flow.first_seen))
        timing_table.add_row("Last Seen:", self._format_timestamp(flow.last_seen))
        
        sections.append(Text("Timing Analysis", style="bold cyan"))
        sections.append(timing_table)
        
        return Group(*sections)
    
    def _format_bytes(self, bytes_count: int) -> str:
        """Format byte count with units"""
        if bytes_count >= 1_000_000_000:
            return f"{bytes_count / 1_000_000_000:.2f} GB"
        elif bytes_count >= 1_000_000:
            return f"{bytes_count / 1_000_000:.2f} MB"
        elif bytes_count >= 1_000:
            return f"{bytes_count / 1_000:.2f} KB"
        else:
            return f"{bytes_count} B"
    
    def _format_timestamp(self, timestamp: float) -> str:
        """Format timestamp for display"""
        import datetime
        dt = datetime.datetime.fromtimestamp(timestamp)
        return dt.strftime("%H:%M:%S.%f")[:-3]


class SubFlowDetailsPanel(Vertical):
    """Bottom panel showing sub-flow details or summary"""
    
    DEFAULT_CSS = """
    SubFlowDetailsPanel {
        height: 1fr;
        padding: 1;
    }
    
    SubFlowDetailsPanel Static {
        margin-bottom: 0;
    }
    """
    
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.current_flow = None
        self.selected_subflow = None
    
    def compose(self):
        """Create the sub-flow details layout"""
        yield Static("Sub-Flow Details", classes="panel-header")
        yield Static(
            "No sub-flow selected",
            id="sub-details-content"
        )
    
    def update_flow(self, flow: Optional['FlowStats'], subflow_type: Optional[str] = None) -> None:
        """Update panel with sub-flow details or summary"""
        self.current_flow = flow
        self.selected_subflow = subflow_type
        content_widget = self.query_one("#sub-details-content", Static)
        
        if not flow:
            content_widget.update("No sub-flow selected")
            return
        
        if subflow_type and subflow_type in flow.frame_types:
            # Show specific sub-flow details
            details = self._create_subflow_details(flow, flow.frame_types[subflow_type])
        else:
            # Show summary of all sub-flows
            details = self._create_subflow_summary(flow)
        
        content_widget.update(details)
    
    def _create_subflow_details(self, flow: 'FlowStats', subflow: 'FrameTypeStats') -> RenderableType:
        """Create specific sub-flow details"""
        sections = []
        
        # Sub-flow identification
        id_table = Table(show_header=False, box=None, padding=0)
        id_table.add_column(style="dim", width=12)
        id_table.add_column()
        
        id_table.add_row("Frame Type:", subflow.frame_type)
        id_table.add_row("Packets:", f"{subflow.count:,}")
        id_table.add_row("Volume:", self._format_bytes(subflow.total_bytes))
        
        percentage = (subflow.count / flow.frame_count * 100) if flow.frame_count > 0 else 0
        id_table.add_row("% of Flow:", f"{percentage:.1f}%")
        
        sections.append(Text("Sub-Flow Information", style="bold yellow"))
        sections.append(id_table)
        
        # Sub-flow timing
        timing_table = Table(show_header=False, box=None, padding=0)
        timing_table.add_column(style="dim", width=12)
        timing_table.add_column()
        
        timing_table.add_row("Avg ΔT:", f"{subflow.avg_inter_arrival * 1000:.1f}ms" if subflow.avg_inter_arrival > 0 else "N/A")
        timing_table.add_row("Std σ:", f"{subflow.std_inter_arrival * 1000:.1f}ms" if subflow.std_inter_arrival > 0 else "N/A")
        timing_table.add_row("Outliers:", f"{len(subflow.outlier_frames)}")
        
        sections.append(Text("Sub-Flow Timing", style="bold cyan"))
        sections.append(timing_table)
        
        # Outlier details if any
        if subflow.outlier_frames and subflow.outlier_details:
            outlier_table = Table(show_header=True, box=None)
            outlier_table.add_column("Frame#", justify="right")
            outlier_table.add_column("ΔT(ms)", justify="right")
            
            for frame_num, delta_t in subflow.outlier_details[:5]:  # Show first 5 outliers
                outlier_table.add_row(
                    str(frame_num),
                    f"{delta_t * 1000:.1f}"
                )
            
            if len(subflow.outlier_details) > 5:
                outlier_table.add_row("...", f"+{len(subflow.outlier_details) - 5} more")
            
            sections.append(Text("Outlier Details", style="bold red"))
            sections.append(outlier_table)
        
        return Group(*sections)
    
    def _create_subflow_summary(self, flow: 'FlowStats') -> RenderableType:
        """Create summary of all sub-flows"""
        if not flow.frame_types or len(flow.frame_types) <= 1:
            return Text("No sub-flows available", style="dim")
        
        sections = []
        sections.append(Text("Sub-Flow Summary", style="bold yellow"))
        
        # Frame type breakdown table
        frame_table = Table(show_header=True, box=None)
        frame_table.add_column("Frame Type", style="blue")
        frame_table.add_column("Count", justify="right")
        frame_table.add_column("%", justify="right", style="dim")
        frame_table.add_column("ΔT(ms)", justify="right", style="cyan")
        frame_table.add_column("σ(ms)", justify="right", style="cyan")
        frame_table.add_column("Out", justify="right", style="red")
        
        total = flow.frame_count
        for frame_type, stats in sorted(
            flow.frame_types.items(), 
            key=lambda x: x[1].count, 
            reverse=True
        ):
            percentage = (stats.count / total * 100) if total > 0 else 0
            delta_t = f"{stats.avg_inter_arrival * 1000:.1f}" if stats.avg_inter_arrival > 0 else "N/A"
            sigma = f"{stats.std_inter_arrival * 1000:.1f}" if stats.std_inter_arrival > 0 else "N/A"
            outliers = str(len(stats.outlier_frames))
            
            frame_table.add_row(
                frame_type[:15],
                f"{stats.count:,}",
                f"{percentage:.1f}%",
                delta_t,
                sigma,
                outliers
            )
        
        sections.append(frame_table)
        return Group(*sections)
    
    def _format_bytes(self, bytes_count: int) -> str:
        """Format byte count with units"""
        if bytes_count >= 1_000_000_000:
            return f"{bytes_count / 1_000_000_000:.2f} GB"
        elif bytes_count >= 1_000_000:
            return f"{bytes_count / 1_000_000:.2f} MB"
        elif bytes_count >= 1_000:
            return f"{bytes_count / 1_000:.2f} KB"
        else:
            return f"{bytes_count} B"


class SplitFlowDetailsPanel(Vertical):
    """Combined panel with top/bottom split for flow and sub-flow details"""
    
    DEFAULT_CSS = """
    SplitFlowDetailsPanel {
        height: 1fr;
        padding: 0;
    }
    
    SplitFlowDetailsPanel > FlowMainDetailsPanel {
        height: 3fr;
    }
    
    SplitFlowDetailsPanel > SubFlowDetailsPanel {
        height: 2fr; 
    }
    """
    
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.current_flow = None
    
    def compose(self):
        """Create the split layout"""
        yield FlowMainDetailsPanel(id="main-flow-details")
        yield SubFlowDetailsPanel(id="sub-flow-details")
    
    def update_flow(self, flow: Optional['FlowStats'], subflow_type: Optional[str] = None) -> None:
        """Update both panels with flow data"""
        self.current_flow = flow
        
        # Update main flow details
        main_panel = self.query_one("#main-flow-details", FlowMainDetailsPanel)
        main_panel.update_flow(flow)
        
        # Update sub-flow details  
        sub_panel = self.query_one("#sub-flow-details", SubFlowDetailsPanel)
        sub_panel.update_flow(flow, subflow_type)